<ARTICLE> 5
       
                                                  
<PERIOD-TYPE>                   3-MOS                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1996
<PERIOD-START>                             JAN-01-1996             JAN-01-1996
<PERIOD-END>                               MAR-31-1996             JUN-30-1996
<CASH>                                           1,229                   4,027
<SECURITIES>                                         0                       0
<RECEIVABLES>                                   44,640                   4,600
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<PP&E>                                         159,429                 172,148
<DEPRECIATION>                                (64,043)                (67,856)
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<PREFERRED>                                          0                       0
<COMMON>                                           835                     835
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<TOTAL-LIABILITY-AND-EQUITY>                   151,841                 165,299
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<TOTAL-REVENUES>                                68,262                 143,124
<CGS>                                                0                       0
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<OTHER-EXPENSES>                                    90                     184
<LOSS-PROVISION>                                     0                       0
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<INCOME-PRETAX>                                  1,060                   3,710
<INCOME-TAX>                                       403                   1,410
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<EPS-PRIMARY>                                      .08                     .28
<EPS-DILUTED>                                      .08                     .28